Window sash fastener



June 5, 1951 c. M.- SMITH WINDOW sAsH FASTENER 3 Sheets-Shea*l 2 Filed May 9, 1947 m INVENTOR. BY a C i u 7 ArroR/vfy E Patented June 5, 1951 Y UNITED STATES PATENT OFFICE WINDOW SASH FASTENER Charles M. Smith, Vallejo, Calif.

Application May 9, 1947, Serial No. 746,897

1 Claim. l

This invention relates to window sash locks; the major object being to provide lock-forming attachments, adapted to be easily and quickly mounted in or removed from place by means of which either sash can only be opened a short distance. At the same time, the attachments can only be removed from the inside, and then by a sequence of operations calling for the initial closing of the inner sash.

A further object of the invention is the provision of an adjustable window sash lock adapted to either maintain the inner sash in a closed position, or limit its travel to a predetermined amount.

A still further object of the invention is the provision of a single locking attachment adapted to limit the travel of either sash, and which is further adapted to prevent rattling of the sashes.

These and other objects of the invention will become apparent during the course of the following description, taken in connection with the accompanying drawings forming a part hereof.

In the drawings:

Figure 1 is a fragmentary side elevation of a double sash window casing, showing the locking attachments in position.

Figure 2 is a section on line 2 2 of Figure 1.

Figure 3 is a section on line 3--3 of Figure 1.

Figure 4 is a perspective view of the inner sash locking attachment. Y

Figure 5 is a perspective view of the outer sash locking attachment.

Figure 6 is a view similar to Figure 1, but showing a modied design of window lock.

Figure 7 is a section on line 'I-I of Figure 6.

Figure 8 is a section on line 8--8 of Figure 6.

Figure 9 is an end elevation of the bolt shown on Figure '7, as viewed from the bolt projecting end.

Figure 10 is a partial view similar to Figure 6 showing an alternate design of the lower sash lock.

Figure `11 is a section on line II--II of Figure 10.

Figure 12 is a section on line I2--I2 of Figure 11.

Figure 13 is a fragmentary elevation of an upper and lower sash shown in phantom with a single locking attachment in place thereon.

Figure 14 is an elevation of the locking plate shown on Figure 13.

Figure l5 is a section on line I5-I5 of Figure 14.

Figure 16 is a plan View of the locking catch `shown on 'Figure 13.

Figure 17 is a side view of the catch.`

Figure 18 is a front elevation of the catch.

Referring to the drawings in detail, with particular reference to Figures 1 to 5 inclusive, the locking attachments comprise an inner sash lock I, and an outer sash lock 2.

The inner lock consists of an elongated flat metal strip 3, provided at its upper end with a horizontal ilange d, projecting into the path of upward movement of the inner sash A. The strip 3, is also provided with vertically spaced permanent pins il, projecting from its back face. The ange is provided with a centrally located notch 6, to clear the sash cord.

The inner sash track l, of the window casing 8, is recessed at the desired point to receive the strip 3, in countersunk relation and matching holes are drilled in said casing to receive the pins 5 as shown in Figure 2.

The outer sash lock 2, consists of a relatively short metal plate 9, provided on one side with a vertical iiange I0, bent away from the window casing or in a direction to project into the path of downward movement of the outer sash B, in the outer sash track II, of the casing 8. This plate also is provided with a pair of backwardly projecting permanent pins I2. The casing 8 is recessed to reecive plate 9 in countersunk relation a short distance below strip 3, so that said plate extends from adjacent the inner window stop I3, across the central partition strip I4 (which is cut away for the depth of the plate as at I5), and into the outer sash track I I.

The two lock attachments are positioned rela tive to each other and to the closed position of the sashes, as indicated on Figure 2, so that the inner sash A covers plate 9, but just clears strip 3, which is above said sash, while sash B is then a short distance above plate 9, and flange IIJ, thereon.

Both sashes can then be opened a short distance only, but are prevented from further opening movement by flanges l and it. It will also be obvious that the inner sash must be fully closed before the lock I can be removed, since said sash otherwise overlaps strip 3. Removal of lock I, enables the inner sash to be fully raised--the only position of said sash which clears lock 2 and enables the same to be removed. It will thus be seen that the locks can only be removed irom the inside and only when the inner sash is fully closed and before the outer sash can be fully opened.

Referring to Figures 6 to 9 inclusive, a modied design of lock is shown wherein an inner sash lock plate I5 consists of an elongated at metal strip provided with suitably located holes for fastening means designated as wood screws I6, and having an elongated vertical slot I1 the lower end, of which, terminates at an enlarged bore I8. The slot is located intermediate the center and one side of the plate I5 to clear the sash cord.

The inner sash track 1, of the window casing 3 is recessed at the proper point to receive the lock strip I5, in countersunk relation, and is further countersunk directly under the elongated slot I1 to a width slightly greater than the enlarged bore I8, and of sufficient depth to provide clearance for the lock bolt pin I9, as shown in phantom on Figure 7. The bolt pin I9 has opposed slots adjacent its projecting end, and when the lock bolt assembly 2I is fixed to the top of the inside sash A, the lock bolt pin I9 will engage the enlarged bore I8 of the lock plate I5 when the bolt pin knob 22 is in raised position in Vslot 23 of the lock bolt shell 24. This engagement will take place automatically through force exerted by the compression coil spring 25 in the lock bolt assembly 2l. It is obvious that this action will completely lock the lower sash, and it cannot be raised until the pin knob 22 is turned to its lowest position in relief slot 25 which is shown in phantom on Figure '1. Slots 28 will then engage the sides of the elongated slot I1 in the lock plate I5, permitting the sash to be raised to the limit of the slot.

When it is desired to completely raise the sash, the bolt pin knob 22 is raised and the bolt pin I3 is brought against the spring 25 until the Ypin knob 22 can engage the relief slot 21,V which holds the bolt pin I9 free from the lock plate I5 The outer sash lock 28 consists of a narrow metal plate provided on one end with a flange 29 having upturned sides forming a U bent away from the window casing or in a direction to project into the path of downward movement of the outer sash B in the outer sash track II. This plate is provided with holes to accommodate dowels 38 which project outwardly from a foundation plate 3l. The inner track 1 is recessed to receive plates 28 and 3l, in countersunk relation, a short distance below lock strip I5, so that said plate extends from adjacent the inner window stop strip I3, across the partition strip I4, which is cut for the width of plate 28, and into the outer sash track II.

The locking attachments are positioned relative to each other and to the closed position of the sashes, so that the inner sash A covers plate 23 while sash Bris then a short distance above plate 28 and the shaped flange 29 thereon. It also becomes obvious that the inner sash must be fully closed before the lock bolt I9 can be adjusted or readjusted in relation to the lock plate I5, and the locking attachment 28 of the outer sash B is only accessable when the inner sash is fully opened.

Figures 10, l1, and l2 illustrate a bracket 32, replacing the bolt assembly 2l, and adapted to slide in the slot'33 of the plate 34. The bracket 32V can be inserted in, and removed from, the slot 33 through the enlarged portion 35 at the lower end thereof. A leaf spring 3S is secured to the back of the plate 34, and projects upwardly across the enlargedportion 35 of the slot 33. l

This spring must be bent backward as shown ,4 in phantom on Figure 1l, before bracket 32 can be inserted or removed from the opening 35. This arrangement makes it impossible to remove bracket 32 by means of a knife blade or like instrument inserted between the sashes from the outside.

Figure 13 is a fragmentary elevation of an upper and lower sash showing a further modification, in which a plate 31 with vertical slot 38 communicating at its lower end with a horizontal slot 39, of greater width, in a laterally extending portion 4U, is secured to the front of the inner side of the outer sash B. The laterally extending portion 40 curves inwardly toward the window pane C, as shown on Figure 15. The

plate 31 is recessed on the back as at 4I in ordei Vto provide clearance for a catch 42 which is adapted to slide in slot 38.

The catch 42 is provided with a backwardly eX- tending rectangular projection 43 which is adaptedto slide vertically in the slot 38 and horizontally in the slot 39. An enlarged portion 44 holds the catch 42 in place in plate 31. Extending perpendicular from the front side of the catch 42, at the lower end thereof, is a flange 45 which has a leaf spring 48 secured to the underside thereof. The upper end of the Vcatch 42-is bent forwardly and downwardly to form a hook Y 41 adapted to engage a conventional type of window latch 48, as shownV on Figure l3.

The plate 31 is attached to the outer sash B in a location just above the inner sash A when Y the latter is in the closed position. The Ycatch is then inserted into the slot 39 by turning it sideways thus allowing the enlarged portion 44` to enter the slot. The catch'is then turned to a vertical position, with the hook 4luppermost,

brought into alinement with and-entered intoV the vertical slot 38. The spring 46, acting against the top surface of the inner sash A, pushes the catch 42 up into the slot 38, and prevents its unintentional or unauthorized removal therefrom. With the catch 42 in place in the slot 38,-t'ne ktravel of either the upper or lower sash, in the combined travel of each, is restricted by the length of the slot 38. Y

The latch 48 further supplements the action of the spring 45, and while drawingV the sashes together and preventing rattling, does not restrict the travel of the catch 42 in the slot 38.

From the foregoing it will be apparent that I.

have provided a means of preventing unauthorized entry into a building by means of windows being opened from the exterior. At the same time the windows can be lopened a suicient amount to provide adequate ventilation. My device further provides a safeguard against the possibility of the windows being raised by small children, and thereby constituting a hazard.

Further modification may be made in the details and arrangement of the various elements, I`

therefor wish to be limited only by the spirit and scope of the appended claim.

I claim:

A fastener for a double sash window construction comprising a window casing having an'outer and an inner track therein; and outer and an inner sash adapted to be moved respectively in the outer and inner tracks the whole length thereof and normally occupying the upper and the lower portions of the window respectively; said fastener comprising an outer lock consisting of a metal `plate being removably secured in the inner track and extending into the ,outer 5 track and terminating in said outer track with a flange bent to project into the path of the downward movement of the outer sash, the portion of said plate in the inner track being covered by the inner sash except when the latter' is in its uppermost open position; an inner lock wholly mounted in the inner track, said inner lock consisting of a mounting element by which said inner lock is removably secured in said track a comparatively short distance from the top of the inner sash and which can be removed from said inner track only when the inner sash is in its lowermost position, and a flange projecting from the upper end of said mounting element into the pa'th of said inner sash to limit the upward movement of said inner sash.

CHARLES M. SMITH.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS m Number Name Date 362,239 Abrams May 3', 1887 1,129,572 Jephson Feb. 23, 1915 1,359,093 Mulford Nov. 16, 1920 1,451,487 Armbroster Apr. 10, 1923 2,029,569 Jones Feb. 4, 1936 

